Growatt SPH4-10KTL3 BH-UP User guide

Type
User guide
Installation
&
Operation Manual
Shenzhen Growatt New Energy CO.,LTD
No.28 Guangming Road, Shiyan Street, Bao’an District,
Shenzhen, P.R.China
No.28 Guangming Road, Shiyan Street, Bao’an District,
Shenzhen, P.R.China
GR-UM-226-A-01
+86 0755 2747 1942 +86 0755 2747 1942
www.ginverter.comwww.ginverter.com
T
E
W
service@ginverter.comservice@ginverter.com
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Manual
Growatt New Energy
Contents
1 Brief Introduction
2 Safety
3.1 Growatt SPH series inverter
3.2 Label Explanation
3.3 Size and weight
3.4 The advantage of the unit of
Growatt SPH
2.1 Purpose Use
2.2 Safety Measure
2.3 Symbols introduction on the
SPH inverter
1.1 Preface
1.2 Target Group
1.3 Product Description
1.4 Safety Instructions
3 Product Description
4 Unpacking
5 Installation 5.1 Basic installation requirements
5.2 Installation requires tools and
RJ 45 terminal sequence of the
LAN line
5.3 Installation Instructions
5.4 SPH System Connection Mode
6.1 Commissioning of SPH
6.2 Operation modes
6.3 Country setting
6.4 Display and button
6.5 Communication
11.1 Dismantling the energy storage
11.2 Packing the SPH inverter
11.3 Storing SPH inverter
11.4 Disposing of theSPH inverter
12.1 Growatt SPH series energy
storage machine product specification
12.2 DC input terminal parameter
12.3 Torque
12.4 Appendix
11 Decommissioning
6 Commissioning
12 Product specification
7.1 Start-up the SPH system
7.2 Disconnect the SPH system
7 Start-up and shut down
SPH system
13 Certificate
14 Contact
9 Fault removal
8 Attention of the installation
environment, maintenance
and cleaning
10 EU Declaration of Conformity
1.1 Preface
1
2
1.2 Target Group
1.3 Product Description
1 Brief Introduction
This manual will provide the users who use the Growatt SPH TL3 BH-UP Series of
Shenzhen Growatt New Energy Technology Co.,LTD(Short for Growatt as below) with the
detailed product information and the installation instructions. Please read this manual
carefully and put this manual on some place where is convenient to installation,
operation, obtain. Any modifications of Growatt new energy, we will not notify the user.
Growatt SPH TL3 BH-UP inverter must be installed by professional electrical personnel
who have obtained the certification of the relevant departments. We have two kinds of
energy storage machine for different battery one is for lithium battery and the other is
for lead-acid battery, we suggest: customer should decide which kind of energy storage
machine you want, Growatt can provide only lithium battery with energy storage
machine, customer can choose lead-acid energy storage machine with no battery provide
by Growatt while they can buy these battery from market easily. Especially if customer
choose energy storage system with lithium battery(which must be provide by Growatt)
but used for lead-acid battery or used lead-acid battery for lithium battery model, it will
be dangerous. Installer can install energy storage machine of Growatt SPH TL3 BH-UP
Series rapidly and troubleshooting, build communication system through read this
manual carefully.If you have any questions in the process of installation, you can login in
www.growatt.com and leave some message.Or you can call our 24-hour service
hotline+86 0755 2747 1942.
Growatt SPH TL3 BH-UP Series is used to store energy generated by the photovoltaic cell
panels or energy from grid if it is allowed in the battery, also energy can be sent to power
grid through SPH TL3 BH-UP for self consumption or when Grid power is lost, SPH TL3
BH-UP can be used as backup power.
SPH series has six kinds of type:
ŸSPH 4000TL3 BH-UP
ŸSPH 5000TL3 BH-UP
ŸSPH 6000TL3 BH-UP
ŸSPH 7000TL3 BH-UP
ŸSPH 8000TL3 BH-UP
ŸSPH 10000TL3 BH-UP
Note: we describe this series as “SPH” as below.
Overview:
Chart 1.1
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
Position Description
LED of status display
LCD screen
Function button
Ground point
Breathable valve
UPS output(off grid connection)
RSD(do not open except by Professional staff)
AC Grid (on grid connection)
Rs485 communication interface(Reserved)
Rs485 communication interface of meter2(Reserved)
NTC: Lead-acid temperature sensor terminal
Rj45 interface of DRMs(used only in Australia)
Rs485 communication interface of meter1
CAN communication interface of Lithium battery
USB interface
PV switch
PV input
Battery terminal
Dry contact
Rs485 communication interface of meter2(Reserved)
4
3
2 Safety
2.1 Purpose Use
1.4 Safety Instructions
1.Please be clear which kind of battery system you want, lithium battery system or lead-
acid battery system, if you choose the wrong system, SPH can't work normally.
2.Please read this manual carefully before the installation, The company has the right not
to quality assurance,If not according to the instructions of this manual for installation
and cause equipment damage.
3.All the operation and connection please professional electrical or mechanical engineer.
4.During installation, Please don't touch the other parts within the box.
5.All the electrical installation must comply with the local electrical safety standards.
6.If equipments needs to maintain, Please contact with local specify system installation
and maintenance personnel.
7.Use the equipment to combined to grid needs to obtain the permission of local power
supply department.
8.When install PV modules in the daytime, please turn off the PV switch, Otherwise it will
be dangerous as high terminal voltage of modules in the sunshine.
The system chart of SPH:
Chart 2.1
As shown above, a complete grid-connected system of SPH consists of PV modules, SPH
inverter, battery, utility grid and other components.
Attention:
As the system refer to battery use, We must make sure ventilation of the service
environment and temperature control in order to prevent the danger of battery
explosion, Battery recommended installation environment must be strictly in accordance
with the specificationif the specification is IP20 environment, the pollution degree of
the unit is PD2, meanwhile the temperature should be control in the 0-40 of indoor
ventilation and the humidity should be 5%-85%. If the chosen PV modules needs to
positive or negative ground connection, please contact with Growatt for technical
support before installation.
2.2 Safety Measure
Risk of high voltage
Relevant operation for professional personnel.
Please notice children, disabled, laypeople do not close.
Supervise and make sure children don't play near the installation position of energy
storage machine.
Risk of burns on the parts shell of SPH inverter
During the work, Cover, shell around, radiator is likely to be hot.
SPH inverter exists radiation maybe affect health
Don't stay a long time within 20cm range from SPH inverter.
Please ensure SPH inverter ground connection is reliable for make sure people's safety.
SPH inverter ground connection
DANGER
DANGER
CAUTION
2.3 Symbols introduction on the SPH inverter
Symbol Description
Caution: Risk of electrical shock!
Caution : hot surface!
Electic meter
15m
AC
Breaker
Breaker
DC
Breaker
AC
Breaker
Sensor
Load
PV Array
Battery
EPSGrid
Electrical Grid
Hybrid
Hybrid
Hybrid Inverter
L1
L2
L3
N
2
Load
EPS
56
3 Product Description
3.1 Growatt SPH series inverter
Marks of SPH
Mark Description Explanation
Push-button
Status symbol of SPH
Operation of display screen and set system
Green light on
Red light on
Green light blinking
Red light blinking
SPH run normally
fault state
Alarm state
Software updating
3.2 Label Explanation
Label contains the following information: for example SPH 10000TL3 BH-UP shows as below:
Caution: risk of danger!
Danger to life due to high voltage in SPH.
There is residual voltage in SPH, SPH requires 5 minutes to
discharge.
Please wait 5 minutes before you open the upper lid or the DC lid.
Protective conductor terminal
Direct Current(DC)
Alternating Current(AC)
Refer to the operating instructions.
The machine complies with the requirements of the applicable
CE guidelines
78
Description of label
The type of product
PV input data
Max. PV voltage
PV voltage range
PV Isc
Max. input current
AC output/input data
Max. output power
Max. apparent power
Nominal output voltage
Max output current
Nominal output Frequency
Power factor range
Stand alone data
Nominal AC output power
Nominal AC output voltage
Nominal AC output Frequency
Battery data
Battery voltage range
Max. charge and discharge current
Type of battery
Others
Safety level
Ingress Protection
Operation Ambient Temperature
Certificates Number
Growatt SPH 10000TL3 BH-UP
1000Vdc
120~1000Vdc
16.9A*2
13.5A*2
10000W
10000VA
3W/N/PE
230/400Vac
15.2A
50Hz/60Hz
0.8 leading~0.8 lagging
10000W
230/400Vac
50Hz/60Hz
100~550Vdc
25A
Lithium / Lead-acid
Class
IP65
-25~+60
( For Australian models)
3.3 Size and weight
Chart 3.1
3.4 The advantage of the unit of Growatt SPH
Features below:
ØAll in one design. Can improve self consumption, back up and also pinch the valley.
ØSmart management, work mode can be set.
ØSafe battery used.
ØEasy installation.
ØTwo mpp tracker input.
Growatt SPH TL3 BH-UP 453 505 198 33
A(mm) B(mm) C(mm) weight(kg)
10
9
4 Unpacking and inspection
Before unpacking, please check whether there are any visible external damages. After
unpacking, please check whether there damages or missing of the parts, if it happen,
please contact with supplier.
Growatt SPH series and accessories shows as follows:
Chart 4.1
Item Number Description
A
B
C
D
E
F
G
H
I
J
K
L
M/N
O/P
1
1
1
2/2
1
1
4
1/1
1
1
1
1
4
1
Mc4 connector (blue connector)
SPH inverter
User Manual
Paper board(installation guide)
Waterproof cover
AC Grid connector
EPS output connector (red connector)
Communication cable
RJ45 connector
M6 setscrew
Ground terminal
M4 setscrew
Mc4 connector(black connector)
Installation 5
5.1 Basic installation requirements
A. The installation location must be suitable for SPH's weight for a long period time.
B. The installation location must conforms with dimension of SPH.
C. Do not install the unit on structures constructed of flammable or thermo labile
materials.
D. The Ingress Protection rate is IP65 and the pollution degree is PD2. Please refer to the
below:
Chart 5.1
Chart 5.2
E. Battery installation option is not far away from the position of SPH, the length
between SPH and battery should not be more than 5m.
F. The ambient temperature should be -25 ~60 .
G. SPH can be installed in vertical or lean back on plane, Please refer to the below:
Lead-acid battery temperature sensor
Q
1
Electic Meter
12
11
H. Installation position shall not prevent access to the disconnection means.
I. In order to ensure machine can run normally and easy to operate, please pay attention
to provide adequate space for SPH, Please refer to below:
Chart 5.3
Chart 5.4
Chart 5.5
Chart 5.6
J. Do not install the machine near television antenna or any other antennas and antenna
cables.
K. Don't install the machine in the living area.
L. Be sure that the machine is out of the children's reach.
M. Taking the battery fixing space into account, about the dimensions please reference
user manual.
N. The Inflammable and explosive dangerous goods must not be placed around battery in
case of cause serious danger.
5.2 Installation requires tools and RJ 45 terminal sequence of the
LAN line.
When installingwe need to use tools as followprepare the follow tools before
installing
LAN line RJ45 sequence as follow:
LAN line 1-8 colors as below:
No. Description
1
2
3
4
5
6
7
Press the RJ45 terminal
Press battery terminal connector
Disconnect PV terminal
Unscrew nut
Unscrew screw
Knock expansion screw
Drill holes on the wall
PIN 12345678
Color White
orange Orange White
green Blue White
blue green White
brown brown
14
13
5.3 Installation Instructions
5.3.1 Attention Layoutlength of sensors consider
Growatt SPH4000-10000TL3 BH-UP only use meter as its sensor, before installing your
system you should know something as below:
1.The cable of meter is suggested not longer than 15m. Because of this, you should
consider the cable length between SPH and combiner box.
2.The meter must installed in the L line.
3.The installation layout of energy storage system at home shows as following:
Chart 5.7
Chart 5.8
5.3.2 Installation of SPH
1.First estimate the size of the inverter on the wall;
2.Determine the location of the drill hole through the cardboard (installation guide), put
the cardboard on the wall and make sure the top edge of the cardboard is horizontal.
3.Mark four points at the wall via the hole of the paper board, then remove the
cardboard.
4.Drill four Ф8 holes at the mark point, the depth is not less than 55mm.
5.Knock four explosion bolt into Ф8 holes (As the chart 5.8b below).
6.Hang the energy storage machine on the four setscrews (As the chart 5.8c below).
7.Lock the nut of setscrew (As the chart 5.8d below).
8.The whole installation has finished.
a) b)
c) d)
5.4 SPH System Connection Mode
5.4.1 Connection of PV terminal
Chart 5.9
PV+
PV-
The InverterSid e
Electic meter
15m
AC
Breaker
Breaker
DC
Breaker
AC
Breaker
Sensor
Load
PV Array
Battery
EPSGrid
Electrical Grid
Hybrid
Hybrid
Hybrid Inverter
L1
L2
L3
N
2
Load
EPS
15 16
Chart 5.10
Chart 5.11
Similar to the traditional inverter connecting, the input of PV panel energy can be
realized by using MC4 PV terminal, the detail steps are as follows:
Step 1: Turn off PV switch.
Step 2: Insert PV panel positive and negative cables into MC4 terminalthen connect
positive pole(+) of connection cable to positive pole(+) of PV input connector, Connect
negative pole(-) of connection cable to negative pole(-)of PV input connector.
Please pay attention to PV input voltage and current within permission Limit:
ØMax PV voltage: 1000V (consider the lowest temperature)
ØMax PV input current: 13.5A
ØMax PV input power per string: 7500W.
Remark:
1. We suggest you use the cable 4mm2/12 AWG to connect.
2. Please do not connect to DC source.
5.4.2 Connection of AC terminal and off grid terminal
SPH has a grid output terminal and off grid out terminal, look down on the SPH from the
front, the terminal on the left (on grid) is grid outlet for connecting grid, the terminal on
the right is an uninterrupted power outlet for connecting critical load.
Wire suggest length:
conductor cross section
max cable length
10AWG
12AWG
Growatt
SPH 4000
TL3 BH
Growatt
SPH 6000
TL3 BH
Growatt
SPH 8000
TL3 BH
Growatt
SPH 5000
TL3 BH
Growatt
SPH 7000
TL3 BH
Growatt
SPH 10000
TL3 BH
88m 59m70m 50m 44m 35m
55m 37m44m 31m 27m 22m
AC output terminal and EPS output terminal connection steps as follow:
Step 1: Uninstall the AC terminal as below chart.
Step 2: Thread cables through pressure screw, seal ring, threaded sleeve in sequence,
insert cables into connection terminal according to polarities indicates on it and tighten
the screws.
Chart 5.12
17 18
Chart 5.13
Chart 5.14
Step 3: Push threaded sleeve on to connection terminal until both are locked tightly.
Step 4:Plug the socket into AC output terminalclockwise rotation to tighten the
socket, counterclockwise rotation to loosen the socket.
The following diagram shows the AC output terminal of the Australian machine
connection steps, EPS output terminal connection steps consistent with the above steps.
AC output terminal and EPS output terminal connection steps as follow:
Step 1: Uninstall the AC terminal as below chart.
Step 2: Thread cables through pressure screw, seal ring, threaded sleeve in sequence,
insert cables into connection terminal according to polarities indicates on it and tighten
the screws.
Step 3: Push threaded sleeve on to connection terminal until both are locked tightly.
Step 4:Plug the socket into AC output terminal until it is locked. Use a flat-blade
screwdriver to hold the buckle and pull out the AC terminal.
Step 5: Plug the AC terminal into the inverter AC port.
Chart 5.15
Chart 5.16
Chart 5.17
Chart 5.18
Chart 5.19
Chart 5.20
Chart 5.21
The recommended wiring diagram is as follows:
Note:
This diagram is an example for gird system without special requirement on electrical
wiring connection.The neutral line is necessary.
Note:
This diagram is an example for Australian and New Zealand gird system where neutral
line can't be switched.The neutral line is necessary.
Chart 5.22
Note:
This diagram is an example for customer who only wants to use the on grid storage
system.The neutral line is necessary.
Notice:
ØIf you want to use on gird only, please refer to chart 5.22 Connect with AC grid and
float EPS OUTPUT.
ØIf you have no battery now, you can also float BAT terminal, and this hybrid inverter
will only work like a PV inverter.
ØIf you want to use both on gird power and backup power, please refer to chart 5.20
and 5.21.Connect with AC grid and EPS OUTPUT like the chart show.
ØOn grid terminal and off grid terminal can't directly connect together.
ØOff Grid terminal can't connect to grid.
ØThe first start of system needs Grid power.
SPHInverter
ACGRID
L3L2L1 N
L3 NE
Battery
PE
PV
Electic meter
E
L1
L2
L3
N
L2L1
Load
RCD
EPS output does not support half-wave load type devices,
such as hair dryers.
19 20
22
Chart 5.23
5.4.3 Connection of battery terminal
Similar to the traditional inverter connecting, the input of battery can be realized by
using MC4 terminal, the detail steps are as follows:
Step 1: Turn off battery switch.
Step 2: Insert battery panel positive and negative cables into MC4 terminalthen
connect positive pole(+) of connection cable to positive pole(+) of battery input
connector, connect negative pole(-) of connection cable to negative pole(-)of battery
input connector.
Please pay attention to battery input voltage and current within permission Limit:
ØMax battery voltage: 550V
ØMax battery input current: 25A
ØMax battery input power : 10000W
Remark:
We suggest you use the cable4mm2/10 AWG to connect.
Note:
We suggest the distance between battery and SPH no longer than 5m, and The power
line area must be larger than 10AWG.
5.4.4 Connection of meter terminal
When customer needs to use meter to monitor the energy flow, the meter terminal
connection steps are as follows:
Step1: Reference 5.2, make LAN cables with RJ45 terminal.
Step2: Thread the swivel nut over the LAN cable.
Step3: Press the cable support sleeve out of the cable gland.
Step4: Remove the filler plug from the cable support sleeve.
Step5: Route the LAN cable through an opening in the cable support sleeve.
Step6: Thread the LAN cable through the cable gland.
Step7: Insert the RJ45 plug of the network cable into the “METER” pin connector on the
inverter until it snaps into place.
Step8: If no other cables need to be installed, lock the waterproof cover to the inverter
with screws.
Step9: Screw the swivel nut onto the waterproof cover.
Note
1. Meter must be provided by Growatt. If not, maybe meter can't communicate with SPH
inverter.
2. The more detail describe of meter installation, please turn to meter user manual.
Chart 5.24
Chart 5.25
21
23 24
Chart 5.26
Chart 5.27
Remark:
Meter wire (15m in length) specification: RJ45, standard LAN line (one end with 8P
modular plug, the other connected with transformer). But if the length is not enough,
customer can add cable, so the length can be increased to 25m max, the operation is as
follow chart:
5.4.5 Connection of communication terminal for lithium battery (CAN)
When using CAN communication with lithium batteriesfor example PYLONTECH X1,
connect lithium battery terminal (RJ45) steps as follows:
Step1: Unscrew the swivel nut from the cable gland.
Step2: Thread the swivel nut over the “CAN” cable.
Step3: Press the cable support sleeve out of the cable gland.
Step4: Remove the filler plug from the cable support sleeve.
Step5: Route the “CAN” cable through an opening in the cable support sleeve.
Step6: Thread the “CAN” cable through the cable gland.
Step7: Insert the RJ45 plug of the network cable into the “CAN” pin connector on the
inverter until it snaps into place.
Step8: If no other cables need to be installed, lock the waterproof cover to the inverter
with screws.
Step9: Screw the swivel nut onto the waterproof cover.
Chart 5.28
Chart 5.29
Note: If you are using a lead-acid battery, you do not need to install this communication
cable.
25 26
Chart 5.30
Chart 5.31
5.4.6 Connection of RS 485 terminal
RS 485 reserved communication interface, can be used for meter communication, please
connect the terminal (RJ45) as follows:
Step1: Unscrew the swivel nut from the cable gland.
Step2: Thread the swivel nut over the “RS485” cable.
Step3: Press the cable support sleeve out of the cable gland.
Step4: Remove the filler plug from the cable support sleeve.
Step5: Route the “RS485” cable through an opening in the cable support sleeve.
Step6: Thread the “RS485” cable through the cable gland.
Step7: Insert the RJ45 plug of the network cable into the “485-1or485-2” pin
connector on the inverter until it snaps into place.
Step8: If no other cables need to be installed, lock the waterproof cover to the inverter
with screws.
Step9: Screw the swivel nut onto the waterproof cover.
5.4.7 Connection of DRMS terminal(Australia only)
When SPH is applied to Australia, the DRMS terminals need to be connected, the
connection way appears as follows:
Step1: Unscrew the swivel nut from the cable gland.
Step2: Thread the swivel nut over the “DRMS” cable.
Step3: Press the cable support sleeve out of the cable gland.
Step4: Remove the filler plug from the cable support sleeve.
Step5: Route the “DRMS” cable through an opening in the cable support sleeve.
Step6: Thread the “DRMS” cable through the cable gland.
Step7: Insert the RJ45 plug of the network cable into the “DRMS” pin connector on the
inverter until it snaps into place.
Step8: If no other cables need to be installed, lock the waterproof cover to the inverter
with screws.
Step9: Screw the swivel nut onto the waterproof cover.
Chart 5.32
Chart 5.33
485-1485-2
485-3
27 28
RJ45 terminal pin assignment
Method of asserting demand response modes
Note:
If the cable such as “NTC” (lead-acid battery temperature sensor) cable is not used,
please do not remove the filler plug from the cable support sleeve.
5.4.8 Connection of temperature probe for lead-acid battery
When customer using lead-acid battery, the temperature probe of the lead-acid battery
is used to detect the ambient temperature of the lead-acid battery, the battery
temperature cable of the SPH side connection steps are as follows:
Step1: Unscrew the swivel nut from the cable gland.
Step2: Thread the swivel nut over the “NTC” cable.
Step3: Press the cable support sleeve out of the cable gland.
Step4: Remove the filler plug from the cable support sleeve.
Step5: Route the “NTC” cable through a min opening in the cable support sleeve.
Step6: Thread the “NTC” cable through the cable gland.
Step7: Insert the RJ45 plug of the network cable into the “NTC” pin connector on the
inverter until it snaps into place.
Step8: If no other cables need to be installed, lock the waterproof cover to the inverter
with screws.
Step9: Screw the swivel nut onto the waterproof cover.
PIN assignment for inverter scapable of both charging and discharging
1
2
3
4
5
6
7
8
DRM5
DRM6
DRM7
DRM8
RefGen
COM/DRM0
/
/
MODE Rj45 socket asserted by shorting pins Requirement
DRM0
DRM5
DRM6
DRM7
DRM8
5 6
1 5
2 5
3 5
4 5
operate the disconnection device
Do not generate power
Do not generate at more than 50% of
rated power
Increase power generation (subject to
constraints from other active DRMs)
Do not generate at more than 75% of
rated power and sink reactive power if
capable
Chart 5.34
Chart 5.35
Note:
1. If you are using a lithium battery, you do not need to install this temperature probe,
the probe of the temperature cable should be attached to the surrounding environment
of the lead-acid battery, and the length of this cable is 1.5m, so pay attention to the
distance of battery and SPH.
2.If the cable such as “NTC” (lead-acid battery temperature sensor) cable is not used,
please do not remove the filler plug from the cable support sleeve.
3029
Chart 5.36
Chart 5.37
5.4.9 Connection of Dry contact
The dry contact is used to communicate with external devices (such as remote start hot
water heater). The wiring steps are as follows:
Step1: Unscrew the swivel nut from the cable gland.
Step2: Thread the swivel nut over the cable.
Step3: Press the cable support sleeve out of the cable gland.
Step4: Remove the filler plug from the cable support sleeve.
Step5: Route the network cable through an opening in the cable support sleeve.
Step6: Thread the network cable through the cable gland.
Step7: Thread cables into connection terminal of the inverter, then press the terminal by
relevant tools and make sure cables are firmly.
Step8: If no other cables need to be installed, lock the waterproof cover to the inverter
with screws.
Step9: Screw the swivel nut onto the waterproof cover.
Note:
If the cable such as “Dry contact” cable is not used, please do not remove the filler plug
from the cable support sleeve.
5.4.10 Grounding connection
SPH must be grounded by cable, the grounding point is showed as follow, and the
minimum grounding cable wire diameter is 10.0mm2.
Chart 5.38
Chart 5.39
PV Array Grounding
Grounding conductor of PV panel brackets must be firmly connected to earth at PV array
side and inverter side and SP side. The sectional area of grounding conductor should be
equal to the sectional area of DC grounding conductor. The minimum wire diameter is
10.0mm2.
DC Grounding
Select the DC Grounding mode according to the local standard and use the PV grounding
terminal box and DC Grounding wires of the same specification.
Grounding Device
If the positive pole or the negative pole of PV array need to be grounded in the PV system,
the inverter output should be insulated by Isolation Transformer. Isolation transformer
must conform to IEC62109-1,-2 standard.
Connection as below:
PV array Inverter
Transformer
Grid
L
N
PE
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Growatt SPH4-10KTL3 BH-UP User guide

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